Liner for centrifugal bowls.



PATENTED JULY 14,1908,

P. LJUNGSTRUM. LINER P OR'OBNTRIPUGAL BOWLS.

APPLICATION FILED, JAN. 18, 1905.

, Tocll whom it may concern;-

* UNITED STATES PATENT OFFICE.

FREDRIK LJUNGSTBGM, OF TUMBA, SWEDEN, ASSIGNOR TO AKTIEBOLAGET SEPARATOR,

' OF STOGKHQLM, SWEDEN, A COMPANY.

LINER non enn'rmrnear. BOWLS.

Patented July 14, lacs.

- Application filed. January 18,1905. Serial No. 241,689.

Be'it known that LFREDRIK LJuNes'rRoM, a subject of the King of Sweden, residing at Tumba, Sweden, have invented certain new and useful Improvements in Liners for Centrifugal Bowls; and I do hereby declare the following to be a full, clear, scription of the invention, such as will enable'others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or. figures of reference marked thereon, which form a:..part. of'this specification.

' This invention relates to division "lates which are used in liners for centrifugal owlsof the bowl, and

for-increasing the capacity which intersect the r'adia line of the bowl, thereby dividing the body of the liquid into thin layers. The kind of such liners mostly used consists of superposedconical disks, or plates. These plates are generally made with straight mantles or sides. If such conical plates are superposed over each other, the perpendicular distance between the mantles of two adjacent plates isv the same at the periphery as at the inner edges of the plates. The smaller the space between the plates the greater the number of plates that can be introduced in the bowl and on this depends directly the skimming capacity of the'bowl.

' part of the-liner and on account hereof it ocll" ,however, the spaces are made toosmall,

the cream which is of a relatively thick cone sistence can not pass between theplates with desired velocity, especially on the inner casions a certain stagnation these parts of the spaces whereby the skirhnnngcapacity is decreased. Y i

It is obvious thatlthe' less the top angle of the cone is the greater is the resistance against the cream-flow moving towards theccnter. The erpendicular space between the conical p ates ought therefore to be greater in. cases when the top angle is smaller than when the top angle is greater. Plates with straight mantles and great top angle.

have, however, an inferior skimming capacity to such plates with small top angle. According to this invention the plates are' made vaulted or curved in such a way that the inclinationtowards the axis of the bowl is greatest at the top and smallest at the bottom. i

p The invention is illustrated in the accomand exact dedrawing, which shows a vertical section of a centrifugal-bowl with my improved form of lates inserted within.

In saiddrawinga designates the bowl; I) the cover, 0 the central feed tube and-d the curved plates having a. great angle at the top and a' small angleat the bottom.

By means of such plates the advantage is obtaihed that the decreasing of the skimming ca acity which is caused-by the great top ang e is more than neutralized by the advantageous inclination of the plates at their lower arts.

As the thickness of the plates is the same all over and the decreasing top angle between their mantles has for consequence that the plates re uire, greater and greater space in vertical r irection the consequence is that the spacesbetween the'plates decrease proportionately outwards, as shown on the drawing. It is obvious that this'fact within certain limits contains no drawback, because the pressure by which the cream is pressed 'inwardly by .means of the skimmed milk increases in proportion to the radial distance from the center-line and at the same time ,the thickness of the cream-layer passing between the plates is decreased.

If relatively thick s aces between them W11 decrease more rapi ly than if thinner plates of the same form are used, for instance, if plates of 1 mm. thickness are used, the decrease of the space between the plates becomes twice as great as if the plates are only one halffmm. thick. It is thus .possible by using thin plates to give the same asmaller and for the skimming ca pacity more advantageous angle at the outer edges without decreasing the spaces between them or the practical limit. For this reason it is advantageous to make the plates of the above mentioned shape very thin, as thereby a considerably greater number of plates can be introduced into a bowl of fixed height and furthermore the skimming capacity of each plate will be increased.

I claim as my invention: 7 1. A liner for centrifugal liquid separators consisting of a scrics'of superimposed separating plates extending from near the axis of the bowl toward the periphery and forming assages between adjacent plates, there bemg a passage between the outer and of the panying plates and the wall of the bowl into which the iassa 'cs between the ilatcs 0 )en each l a l l 1 plate being so formed that the width of the spaces between it and its v adjacent plates is less at the cuter than at the innerends of said s aces.

2. liner for centrifugal liquid se arators each plate,

is less at the outer than at 'theinner ends of said s aces.

v the inner en s of said spaces.

rating plates extending from near the axis of the plates 0 thatthe wi 3.. liner for centrifugal liquid separators consisting of a series of superimposedconverging-separating lates, extending from near the axis'of the owl toward the eriphcry and forming passages between ad a passage between the. outer ends of the plates and they wall of'the bowl, an'dtinto'which the passages between en, each plate being 'so' formed th of'the spaces between .it and plates,v there j being its adjacent lates isless at the cuter than at 4 A liner for centrifugal liquid separators consisting of a series of superimposed sepathe bowl'toward the periphery and forming.

- passages between adjacent plates, there be- ,plate being so formed that the .wi

spaces between it and its adjacent plates is separating which t e Lang a passage between the outer end of the plates and the'wall of the bowl into which.

the passages between the plates 0 en', each (ith' of the gradually narrowed from the innerends of said s aces outward.

5. liner for centrifugal liquid se arators consisting of a series of superimpose curved .axis of the bowl toward the periphery and forming passages between adjacentplates, there being a passage between the outer end ofv the lates and the wall of the bowl into ass'ages between the plates 0 en, each plate betweenthe outer endeing so formed that the widt of the spaces between it and its adjacent plates consisting of a series j acent plates, extending from near the eing so formed that the widt of seam the spaces between it and its adjacent plates a a y said sXaces outward. 6. .lin

er for centrifugal liquid separators of :a series of superimposed conthe plates 0' 'e'n, each plate being so formed that the wi th of the spaces between it and its "adjacent plates is gradually narrowed from the inner ends 7. A liner for centrifugal liquid se arators same thickness .throu from near the axis of periphe and formingpassages between adacent p ates, there being a passage between the outer end of the plates and the wall of the bowl into which the passages between the plates 0 en, each plate being so formed that the widt of the spaces between it and its adjacent plates is gradually narrowed from the inner ends of said s'paces'outward.

8; A- liner for centrifugalliquidse arators consisting of 'a series of super-impose curved se aratin lates, havi their -Inantles of P g P i ng the same thickness throughout and extending from near the'axis of thebowl towardthe periphe andforniing passages between adacentp ates, there being a passage between the outer endof the plates and the wall of the bowl into which the passages between the plates open, all the curved p ates being of the t and extending same sha e so that the wldth'of' the spaces between t em on account of theircurvature ma be gradually narrowed from the inner en oi said spaces outward;

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

, FREDRIK LJUNGSIROM. Witnesses:-

v TH.- WAWRINSKY,

L. KALLENBERG.

narrowed from the inner end of of said spaces outward.

v of su erimpose curved separating plates, having t eir mantles of the g on the bowl toward the a 

